Johnny Cash was a prolific writer, and not just of songs. Some of the icon's unreleased poems and letters will see the light of day thanks to a new album, Johnny Cash: Forever Words.

Cash's son, John Carter Cash, and Steve Berkowitz served as producers for the project, talk of which began circulating last year. The group sifted through many of the country legend's handwritten letters, poems and documents penned throughout his lifetime. They then reached out to several artists inspired by the late singer to reinterpret what they found.

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"Determining the artist for each song was truly a matter of the heart," Carter Cash says in a statement. "I picked the artists who are most connected with my father, who had a personal story that was connected with Dad. It became an exciting endeavor to go through these works, to put them together and present them to different people who could finish them in a way that I believed that Dad would have wanted."